package org.application.calculator.logic;

public class Substraction implements Node{

	private Node son1;
	private Node son2;
	
	public Substraction(Node son1, Node son2){
		this.son1 = son1;
		this.son2 = son2;
	}
	
	@Override
	public String toString(){
		return "( " + son1.toString() + " - " + son2.toString() + " )";
	}
	
	public double evaluate(){
		return son1.evaluate() - son2.evaluate();
	}
}
